Recently, Microsoft released Internet Explorer 8, which boasted much better standards compliance than previous iterations of the browser. While it passed the Acid2 test, IE8 failed miserably in the Acid3 test, and many people criticised Microsoft for it. Microsoft Australia's Nick Hodge has stated that Microsoft purposefully decided not to support Acid3, because the test tests against draft standards.

JIT javascript compilers deliver very impressive performance and open up entirely new capabilities.

Perhaps, as a web developer, it is time that you updated your skills to encompass these new emerging standards-based features, rather than relying on the already-on-its-way-out non-standrad quirks of IE and proprietary plugins for it.